/*
 *  Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The ASF licenses this file to You under the Apache License, Version 2.0
 *  (the "License"); you may not use this file except in compliance with
 *  the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

/**
 * @author Alexander V. Esin
 */

package org.apache.harmony.security.x509;

/**
 * Text utils for processing DN string representations
 */

public class Utils {

	/**
	 * Checks if the string is PrintableString (see X.680)
	 * 
	 * @param str
	 *            input string
	 * @return true if the string is PrintableString, false otherwise
	 */
	public static boolean isPrintableString(String str) {
		for (int i = 0; i < str.length(); ++i) {
			final char ch = str.charAt(i);
			if (!(ch == 0x20 || ch >= 0x27 && ch <= 0x29 // '()
					|| ch >= 0x2B && ch <= 0x3A // +,-./0-9:
					|| ch == '=' || ch == '?' || ch >= 'A' && ch <= 'Z' || ch >= 'a'
					&& ch <= 'z')) {
				return false;
			}
		}
		return true;
	}
}